We're only into week one of the rotating list of 'Mutations' coming to Left 4 Dead 2, but the code-burrowing Steam forum goers may have already dug up a good portion of the 20-plus game variations coming.

We know that "Realism Versus" is legit, as is "Chainsaw [Massacre]," but the list is full of placeholders, so set your expectations accordingly. "No Health Versus" and "Vip Target" sound like the kind of tension-filled fun that we're hoping for from Left 4 Dead 2's new expansion, of which we already identified Mutations as one of the add-on's highlights.

Here's the full list.

First Man Out
Four Swords Men
Head Shots Only
Last Man On Earth
Linear Scavenge
Max Specials
No Health Versus
Realism Versus
Temporary Health
Ultra Realism
Versus Survival
Vip Target


List of all Mutations (Found in the VScripts) [Steam Forums via Dtoid]